The Periodic Table Flashcards
1
Q
Features of Mendeleev’s table
A
Arranged in order if atomic mass Fewer elements No block of transition metals Noble gases were not included Actinides and lanthanides were not present
2
Q
The work of Mendeleev in the development of the modern periodic table
A
He arranged elements in order of atomic mass
He left gaps for undiscovered elements
He arranged the order of certain elements to suit properties
3
Q
Group 1
A
Alkali metals
4
Q
Group 2
A
Alkaline earth metals
5
Q
Group 7
A
Halogens
6
Q
Group 0
A
Noble gases
7
Q
Period
A
Horizontal rows
8
Q
Group
A
Vertical columns
9
Q
Features of the modern periodic table
A
Arranged in order of atomic number More elements Block of transition metals Noble gases included Actinides and lanthanides are present
10
Q
Trends going down group 1
A
Reactivity increases
Melting point decreases
11
Q
Half equation
A
+ _
Eg. Na –> Na + e
12
Q
Reactions of group 1 elements with water
A
Metal+water->hydroxide+hydrogen
